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I have successfully installed Mate Olivia and at first everything was quite normal. But then out of the blue (possibly after updates), the menu button has completely disappeared from the left bottom of the screen. I am limping along with Alt+F1 but I really would like to have my menu button back.

If anybody knows an easy cure, I would appreciate input. I am not a very versed Linux user so please make the answer such that a Linux novice can understand it.

Thanks guys for all the suggestions. Unfortunately none of them worked.

I suspect that I got a bum .iso. That has happened to me before. The only ones I trust are from the Madison University but the other day their server was so busy that it would have taken more than 4 hours to download. So I downloaded from a local server instead.

I now got a copy from Madison and there is no problem after I installed that. So for now the problem is solved.